Efest 18650 3100mAh (Black)

DSC_0825

Official specifications:
Efest%2018650%203100mAh%20(Black)-info

This battery uses a unusual construction with the protection mounted at the + pole. The maximum current from this battery is not very high, probably due to the unusual protection placement.

DSC_0790

DSC_0826 DSC_0827

DSC_0828
DSC_0829
DSC_0830

Efest%2018650%203100mAh%20(Black)-Capacity

Efest%2018650%203100mAh%20(Black)-CapacityTimeHours

Efest%2018650%203100mAh%20(Black)-CapacityTime

Efest%2018650%203100mAh%20(Black)-Energy

Efest%2018650%203100mAh%20(Black)-PowerLoadTime

Efest%2018650%203100mAh%20(Black)-TripCurrent

Protection trip current is to low to show in the chart.

Efest%2018650%203100mAh%20(Black)-Charge



Conclusion

This battery uses a very good cell and is one of the shortest 3100mAh protected batteries, but due to the low current limit it will not work in all lights (The problem is XM-L lights).



Notes and links

The batteries was supplied by Efest for review.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries